4 files changed, 12 insertions, 12 deletions
diff --git a/src/display/color.rs b/src/display/color.rs
index 2a023f1d9564..b1e799c5ed9f 100644
--- a/src/display/color.rs
+++ b/src/display/color.rs
@@ -16,21 +16,21 @@ impl Color {
 }
 
 impl color::Color for Color {
-    fn write_fg(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn write_fg(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.write_fg(f)
     }
 
-    fn write_bg(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn write_bg(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.write_bg(f)
     }
 }
 
 impl<'a> color::Color for &'a Color {
-    fn write_fg(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn write_fg(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.write_fg(f)
     }
 
-    fn write_bg(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn write_bg(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.write_bg(f)
     }
 }
@@ -56,7 +56,7 @@ impl ColorVisitor {
 impl<'de> Visitor<'de> for ColorVisitor {
     type Value = Color;
 
-    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+    fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
         formatter.write_str("A color")
     }
 
diff --git a/src/display/draw_box.rs b/src/display/draw_box.rs
index 3b2b4aaf4f1d..1b3958cefca8 100644
--- a/src/display/draw_box.rs
+++ b/src/display/draw_box.rs
@@ -140,7 +140,7 @@ impl Stylable for Line {
 }
 
 impl Stylable for Neighbors<Option<BoxStyle>> {
-    fn style(&self, style: BoxStyle) -> char {
+    fn style(&self, _style: BoxStyle) -> char {
         use BoxStyle::*;
         match (self.left, self.right, self.top, self.bottom) {
             (None, None, None, None) => BOX,
diff --git a/src/display/mod.rs b/src/display/mod.rs
index 2df4277f4fa7..6e37a03d8c55 100644
--- a/src/display/mod.rs
+++ b/src/display/mod.rs
@@ -17,17 +17,17 @@ pub fn clear<T: Write>(out: &mut T) -> io::Result<()> {
 pub trait Draw: Positioned {
     /// Draw this entity, assuming the character is already at the correct
     /// position
-    fn do_draw(&self, out: &mut Write) -> io::Result<()>;
+    fn do_draw(&self, out: &mut dyn Write) -> io::Result<()>;
 }
 
 impl<T: Draw> Draw for &T {
-    fn do_draw(&self, out: &mut Write) -> io::Result<()> {
+    fn do_draw(&self, out: &mut dyn Write) -> io::Result<()> {
         (**self).do_draw(out)
     }
 }
 
 impl<T: Draw> Draw for Box<T> {
-    fn do_draw(&self, out: &mut Write) -> io::Result<()> {
+    fn do_draw(&self, out: &mut dyn Write) -> io::Result<()> {
         (**self).do_draw(out)
     }
 }
@@ -36,7 +36,7 @@ pub trait DrawWithNeighbors: Positioned {
     #[allow(clippy::borrowed_box)]
     fn do_draw_with_neighbors<'a, 'b>(
         &'a self,
-        out: &'b mut Write,
+        out: &'b mut dyn Write,
         neighbors: &'a Neighbors<Vec<&'a Box<dyn Entity>>>,
     ) -> io::Result<()>;
 }
@@ -44,7 +44,7 @@ pub trait DrawWithNeighbors: Positioned {
 impl<T: Draw> DrawWithNeighbors for T {
     fn do_draw_with_neighbors<'a, 'b>(
         &'a self,
-        out: &'b mut Write,
+        out: &'b mut dyn Write,
         _neighbors: &'a Neighbors<Vec<&'a Box<dyn Entity>>>,
     ) -> io::Result<()> {
         self.do_draw(out)
diff --git a/src/display/viewport.rs b/src/display/viewport.rs
index 5ff56be0a909..9d17bc87dcff 100644
--- a/src/display/viewport.rs
+++ b/src/display/viewport.rs
@@ -68,7 +68,7 @@ impl<W> Viewport<W> {
 }
 
 impl<W> Debug for Viewport<W> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "Viewport {{ outer: {:?}, inner: {:?}, out: <OUT> }}",